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mingkuang-Chuyu avatar mingkuang-Chuyu commented on July 17, 2024

感谢反馈。问题的原因是，构建脚本错误的使用 excel 的LOOKUP来确定ucrt函数是否在msvcrt中。
由于此函数是模糊匹配，这会导致 tanh 匹配 tanhf，_ftime匹配_ftime32等情况发生。这使我错误的认为这些ucrt函数在msvcrt中是存在的，然后引入了错误的函数导入。

影响范围

问题影响较低。只影响NT5.2 x64系统无法运行目标平台为5.2.3790.0 x64的编译产物。

其他目标平台由于msvcrt恰好拥有这些函数或者压根就没有相关函数直接被静态导入了，所以未能触发此问题。

临时缓解方案

无。只能等待VC-LTL发布新版本。

修复方案

现在已经使用XLOOKUP重新纠正函数搜索脚本，并且确认现在5.2.3790.0 x64目标中以下函数受到影响需要跟进解决：

; 调用tanh，这是它等效的double版本
tanhf

; 下面的时间相关函数使用weak转发到对应的VC6时代的无32后缀版本即可
_wutime32 
_wctime32
_utime32
_time32
_mktime32
_localtime32
_gmtime32
_futime32
_ftime32
_ctime32

; 已经实现，调整编译条件，5.2.3790.0 x64重新编译即可
_set_controlfp

from vc-ltl5.

mingkuang-Chuyu avatar mingkuang-Chuyu commented on July 17, 2024

https://github.com/Chuyu-Team/VC-LTL5/releases/tag/v5.0.6-Beta5

from vc-ltl5.

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